Oils, oils, animal and vegetable oils have great harm to the environment and human health, and the market testing requirements are prominent. Therefore, it is extremely urgent to formulate standards for detection methods. Recently, the Ministry of Ecology and Environment issued a request for the search for water quality oils for the determination of ultraviolet radiation. A letter from the three national environmental protection standards, such as spectrophotometry (Draft for Soliciting Opinions). If you have any objection, you can send a written opinion to the Ministry of Ecology before June 15, 2018.
Petroleum, animal and vegetable oils are one of the key pollution source monitoring projects in recent years. Finding a detection technology capable of monitoring oil pollution in water is an essential part of oil, water, and environmental pollution. Huge market demand has accelerated detection technology. The speed of the update. Since the 1990s, the IR rule has been used for its sensitivity, and its comprehensive analysis of the advantages of the material occupy the main position of the oil detection method. Currently, China's methods for the determination of oils are infrared spectrophotometry, UV spectrophotometry. Fluorescence spectrometry
As the only standard method for the determination of oil in water by the environmental protection industry in China, infrared spectrophotometry is widely used. Since the carbon tetrachloride used as the extractant was listed as a phase-out substance by the Montreal Convention, China has banned tetrachlorination in 2003. Carbon is used as a cleaning agent and a dry-cleaning agent. However, carbon tetrachloride is still used in the analysis of water in oils, oils, animal and vegetable oils for infrared spectrophotometry (HJ637-2012).
In order to complete the elimination of carbon tetrachloride, China has been researching alternative extractants and oil determination methods. In December 2017, the “Water Quality Determination of Petroleum and Animal and Vegetable Oils” (Infrared Spectrophotometry) (HJ 637-2012) was conducted. The second revision. The "Infrared spectrophotometric method for the determination of water, petroleum, animal and vegetable oils," currently being revised, uses tetrachloroethylene as an extractant instead of carbon tetrachloride.
In order to further standardize the determination methods of petroleum oils in the water, the "Determination of Water Quality Petroleum Spectrophotometry (Consultation Draft)", "Determination of Water Quality Petroleum Spectrofluorometry", and "Determination of Water Quality Oil Grading Method" Published for the first time, it is applicable to the determination of petroleum in surface water, groundwater and seawater. It is applicable to the determination of oils (oil and animal and vegetable oils) in sewage.
The notification clearly stated that due to the high purity requirement of tetrachloroethylene and the new revised method to detect high limits, it is not able to meet the needs for the determination of Class I-III surface water and Class I and Class II seawater petroleum, so there is an urgent need to develop other feasible methods. The research of the analysis method. The further improvement of the testing standards will promote the development of the oil detection industry in the water industry to standardization. The formulation or introduction of new standards will definitely bring new opportunities to this market.
